I gave away all my action figures many years ago. I never figured out what some of them were. Maybe you can help...https://imgur.com/a/v4CXU
I tried to draw them from memory. Note that I had all these figures by the late 1990s.
A: Maybe 7" tall, cartoony... thing... with missing parts. None of the remaining hands had wrist joints, and looking into his arm, it looked like there was some kind of mechanism. His torso was a hollow shell, with that hole in the stomach and with the whole back open. He appears to be wrapped in rope.
B: I made my user name based on this guy. Maybe 9-10". Fabric hat glued to head. Head slightly rubbery. Fabric shirt (that I often used on 5-6" figures).
C: "Barbarian". 5"+, not much to say that's not in the drawing except that those leggings are fabric and removable.
D: "Opera Singer". 5"-, billowy shirt tight at waist. The arms have above-elbow rotation but no usual elbow joint, and combined with the hip joints at an angle, they make me think "Playmates", but I haven't had any luck with that line of research.
E: No drawing. "Biker". 5-6". Black goatee, short ponytail. Some sort of black leather/tough-looking outfit with silver accents. Stands with knees bent, one leg farther forward.
F: Elsewhere, someone identified this as Fugitoid from Ninja Turtles.